[U-Boot] [PATCH v2 18/47] x86: Allow use of global_data with EFI

[Simon Glass]

On 2 August 2015 at 08:32, Bin Meng <bmeng.cn at gmail.com> wrote:
> Hi Simon,
>
> On Fri, Jul 31, 2015 at 11:31 PM, Simon Glass <sjg at chromium.org> wrote:
>> On x86 the global_data pointer is provided through a somewhat-bizarre and
>> x86-specific mechanism: the F segment register is set to a pointer to the
>> start of global_data, so that accesses can use this build-in register.
>>
>> When running as an EFI payload we don't want to mess with the Global
>
> Nits: running as an EFI application
>
>> Descriptor Table (GDT) and there is little advantage (in terms of code size)
>> to doing so.
>>
>> Allow global_data to be a simple variable in this case.
>>
>> Signed-off-by: Simon Glass <sjg at chromium.org>
>> ---
>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

Applied to u-boot-x86.

>
>>
>> Changes in v2:
>> - Move this patch to before the EFI start-up code patch
>> - Refer to FS as F segment register instead of frame segment register
>> - Rename CONFIG_ARCH_EFI to CONFIG_EFI_APP
>>
>>  arch/x86/include/asm/global_data.h | 7 +++++++
>>  1 file changed, 7 insertions(+)